1 files changed, 51 insertions, 0 deletions
diff --git a/Map/Business/MapParser/Strategies/GroupParserStrategy.swift b/Map/Business/MapParser/Strategies/GroupParserStrategy.swift
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+++ b/Map/Business/MapParser/Strategies/GroupParserStrategy.swift
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+// Copyright (C) 2024 Rubén Beltrán del Río
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see https://map.tranquil.systems.
+import Foundation
+
+struct GroupParserStrategy: MapParserStrategy {
+  private let regex = MapParsingPatterns.group
+
+  func canHandle(line: String) -> Bool {
+    let range = NSRange(location: 0, length: line.utf16.count)
+    let matches = regex.matches(in: String(line), options: [], range: range)
+    return matches.count > 0 && matches[0].numberOfRanges == 3
+  }
+
+  func handle(index: Int, line: String, vertices: [String: Vertex]) -> (Any.Type, Any) {
+    let range = NSRange(location: 0, length: line.utf16.count)
+    let matches = regex.matches(in: String(line), options: [], range: range)
+
+    let match = matches[0]
+    var groupVertices: [Vertex] = []
+    let vertexIdString = String(line[Range(match.range(at: 2), in: line)!])
+    let vertexIds = vertexIdString.split(separator: ",", omittingEmptySubsequences: true).map(
+      String.init
+    ).map({ vertexId in
+      vertexId.trimmingCharacters(in: .whitespacesAndNewlines)
+    })
+
+    for vertexId in vertexIds {
+      if let vertex = vertices[vertexId] {
+        groupVertices.append(vertex)
+      }
+    }
+
+    if groupVertices.count > 0 {
+      return ([Vertex].self, groupVertices)
+    }
+
+    return (NSObject.self, NSObject())
+  }
+}